What about the button, exhaust pipe and pressure gauge at 0:11? A true enthusiast would know, not that I am one.

The Williams with Damon in it is the FW16. The air intake is too rounded to be the FW17 and the car lacks the 1996 mandated high cockpit sides to be the 18. The 16 had a semi-circular intake. The 17's was more triangular.

The shot looks familiar and I suspect it's from pre-season testing and not from the Portuguese GP. It is definitely Estoril. In fact looking closely, the mirrors are white. Early in the season the cars had white mirrors. From Imola onwards they had blue mirrors. So it must be pre-season.